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  1. still waiting?

    still waiting?
  2. yes, same one as being discussed.

    yes, same one as being discussed.
  3. There is only a 24V W terminal. No W2 so unlike...

    There is only a 24V W terminal. No W2 so unlike the Infinity/Evolution, connection for a 2-stage stat is physically not possible.

    From tj's earlier post w/ info from the York tech guy that really...
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    i would have said combustion air until you said...

    i would have said combustion air until you said it was spliced into the return ducting. now i'll say weird uncontrolled ventilation.
  5. partially blocking the return could impact things...

    partially blocking the return could impact things based on the total CFM of the system and the total return size after blocking. if you do that you may need to increase the other return or add an...
  6. according to the documentation, Run 2 mode occurs...

    according to the documentation, Run 2 mode occurs after the thermostat opens the W contact saying it's satisfied.

    - if the furnace calculates that demand can be met by the minimum firing rate or...
  7. For retrofitting a PSC motor with ECM you should...

    For retrofitting a PSC motor with ECM you should look at the Genteq Evergreen or Emerson Rescue EcoTech. These can wire directly to the PSC speed taps on most control boards. The X-13 is a basic ECM...
  8. Thanks for the update. A still open question...

    Thanks for the update.

    A still open question is if having the COMM stat helps the modulation control algorithms by passing set point and interior temperature data to the furnace control board.
    ...
  9. You mention this issue was noticed after the new...

    You mention this issue was noticed after the new system went in. Is this a new issue with your new system and wasn't a problem with the old one? Were there any ducting changes done with the install?...
  10. Thread: Boilers

    by drewski11
    Replies
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    1,082

    My parents have a W-M Ultra Plus indirect. It has...

    My parents have a W-M Ultra Plus indirect. It has it's own thermostat / aquastat so will only call for the boiler to run when it needs it. If you have a high BTU boiler connected to it the water will...
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    The TH8320 can definitely support the additional...

    The TH8320 can definitely support the additional sensor. Either Outdoor or Remote Indoor, but not both.

    It's odd that it skips to 500 because 350 & 360 are Heat Pump related settings. Possibly...
  12. i'll see. right now i have a wireless t-stat...

    i'll see. right now i have a wireless t-stat controlling the furnace so testing the new Stat would require running some new wiring which may not happen unless i agree to buy.

    the issues with...
  13. motorized valve in the drainline? something like...

    motorized valve in the drainline? something like a hydronic zone valve? closed on heating call, open on cooling call?
  14. thanks for the info! interested to see the next...

    thanks for the info! interested to see the next report!

    as i mentioned previously, my contractor, LJ Kruse in Berkeley has one. i should get them to temporarily hook it to my furnace to see what...
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    my contractor got one for me last Thursday. we...

    my contractor got one for me last Thursday. we haven't decided whether to buy / install it or not.

    here's a post discussing some of what it can / can't do. all info not verified yet....
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    it was PVC. i think the comment was directed...

    it was PVC.

    i think the comment was directed at your post. shouldn't the liquid PVC cement be dry before firing up the furnace and having wet exhaust gases flowing through it?
  17. there are 3 jumper settings for Cont Fan on the...

    there are 3 jumper settings for Cont Fan on the board. tj said the low speed on the board was still too high.

    the Comm Stat docs say it can adjust as low as 17% fan speed which i'm guessing is...
  18. it looks like the continuous fan speed can be...

    it looks like the continuous fan speed can be controlled in Heating Mode (i.e. in Heating Mode, but burners not firing. Continuous Fan set to On). what you can't modify is the fan speed while the...
  19. have you tried the continuous fan mode to help...

    have you tried the continuous fan mode to help even the heat between cycles?
  20. if it's any consolation, this thread is giving me...

    if it's any consolation, this thread is giving me some buyers remorse for the YP9C sitting in my crawlspace. My contractor actually told me to hold off on the communicating stat until he researches...
  21. is the York ambiguity helping to alleve your...

    is the York ambiguity helping to alleve your buyers remorse? :)
  22. Replies
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    The Aprilaire has a pretty good design, imo, with...

    The Aprilaire has a pretty good design, imo, with the expanding filter sliding into tracks at the top & bottom of the cabinet (2410) minimizing unfiltered air sneaking around the filter. I like the...
  23. I believe your buddy when he says the modulation...

    I believe your buddy when he says the modulation is board controlled. It doesn't matter to me whether the algorithm is in the furnace or in the stat.

    What is not clear is if any data is being...
  24. I just re-read the whole thread to see what I...

    I just re-read the whole thread to see what I missed and I don't know we're all on the same page.

    I think I can say we're in agreement that the modulation algorithms are on the furnace control...
  25. Are all 17 loops controlled by one thermostat or...

    Are all 17 loops controlled by one thermostat or are there multiple zones and zone valves?

    As others have said, there's probably both a pump size issue as well as a balancing issue between all...
  26. I noticed on the Coleman page for the stat...

    I noticed on the Coleman page for the stat (http://www.colemanhvacdealer.com/products/residential/3238/S1-TTSCC01.aspx) that is says


    This is implying that even if the heat modulation logic is...
  27. My HVAC contractor just sent me an email that the...

    My HVAC contractor just sent me an email that the York Touchscreen Communicating T-Stat is now available. He was sent tech & installation specs today, but no pricing info yet.
  28. what Carrier furnace do you have? pretty sure...

    what Carrier furnace do you have? pretty sure most have the "Comfort Fan" option to adjust your continuous fan speed from the T-stat.

    switch the fan from On to Auto for 1-2 seconds and then back...
  29. Setting your 2.5T a/c to 1400 CFM doesn't sound...

    Setting your 2.5T a/c to 1400 CFM doesn't sound right at all.

    What is the output temp at your supply registers? It sounds to me that the new install may have caused some supply duct leaks so the...
  30. how were they "checked out"? the downstairs unit...

    how were they "checked out"? the downstairs unit sounds like it's short-cycling.

    you may be able to have the CPH (cycles per hour) adjusted in the t-stat which could help.
  31. Replies
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    578

    Bryant HP compare chart...

    Bryant HP compare chart
    http://www.bryant.com/products/acheatpumps/heatpumps/comparison.shtml
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    Honeywell IAQ t-stat has the relays in the...

    Honeywell IAQ t-stat has the relays in the remotely mounted (by furnace / air handler) EIM (Equipment Interface Module). Still clicks, but not at the t-stat.

    But it's not "basic"
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    i say save some $ and go with a high quality...

    i say save some $ and go with a high quality media filter like the Aprilaire 2410 instead of the Clean Effects
  34. A/C's are rated by tonnage. Furnaces are rated by...

    A/C's are rated by tonnage. Furnaces are rated by BTU input / output.

    The "5 ton" furnace has a blower rated for "up to 5 tons" or up to 2000 CFM (400 CFM / ton), but the blower can be adjusted...
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    iirc, the costs per tier are the same. PG&E has...

    iirc, the costs per tier are the same. PG&E has higher baselines in the winter effectively making the overall costs for the same amount of electricity cheaper than in summer.
  36. Replies
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    my baseline in Oakland is about 1/2 of yours....

    my baseline in Oakland is about 1/2 of yours. 8.3kwh per billing day. i think it's 9.* kwh per billind day in the winter. we're in Tier 3 right now @ $0.29.
  37. Replies
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    51,969

    The issue with the heat pump for Blue & myself...

    The issue with the heat pump for Blue & myself out here in California is, as was mentioned, the tiered electric rates. With Kwh upwards of $0.40, the heat pump needs a COP in the upper single digits...
  38. Replies
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    Heat rises and cold air drops. The heat from the...

    Heat rises and cold air drops. The heat from the first floor can be rising to upstairs and stressing the upstairs system, while the cool air produced by the upstairs can be flowing down the stairs...
  39. looks to be telephone only for the IAQ....

    looks to be telephone only for the IAQ.
    http://www.forwardthinking.honeywell.com/related_links/combustion/tam/sell/63_9706.pdf

    why do you want remote internet control? seems a little overkill for...
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    The filter could be in the return grille. If so...

    The filter could be in the return grille. If so you should be able to see it through the grille and probably have thumb screws or larger screws to easily take off the front to access it.

    Or it...
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    My Bryant manual says the system can be used...

    My Bryant manual says the system can be used during construction and then gives a list of conditions that need to be met like:
    - Permanently installed with all electrical, piping, venting and...
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    did you tell him your old unit did not perform...

    did you tell him your old unit did not perform like this? what did he say regarding Man J and sizing of the system?
  43. what is "humidity control with an outdoor reset"?...

    what is "humidity control with an outdoor reset"? if you have an OAT sensor attached you can select 9 levels to vary based on OAT with IAQ similar to that picture in the post you made on Infinity...
  44. Pretty sure the Honeywell IAQ will average remote...

    Pretty sure the Honeywell IAQ will average remote sensors.

    The Infinity can have a remote sensor, but I think you have to choose internal temp vs. remote. it won't average them.
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    yes. same parent company . . . and then ICP is...

    yes. same parent company . . . and then ICP is owned by Carrier
    http://www.icpusa.com/default.htm
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    for the bedrooms to facilitate air getting back...

    for the bedrooms to facilitate air getting back to the central return.
    ...
  47. returns may be off, but i don't think it would...

    returns may be off, but i don't think it would cause 5+ degrees of overcooling! have you contacted the installing company?
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    must be. looks like it's "off" to me :D

    must be. looks like it's "off" to me :D
  49. The coil may be convertible to R410a by changing...

    The coil may be convertible to R410a by changing the metering device. Is your current guy a Rheem dealer?
  50. the tax credit is $1500 per home so can't double...

    the tax credit is $1500 per home so can't double up w/ spouse filing separately
    http://energystar.custhelp.com/cgi-bin/energystar.cfg/php/enduser/std_adp.php?p_faqid=5595&p_created=1236876860
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